NB : Possibly this is off-topic - but I am in a jam and am looking for some tips.

There was this standalone bipolar stepper drive which had a parametrization control with a 8051 ; clock from a VCO; L297 front end and finally two L298 in parallel to get a chopper drive upto 3.5A per phase.

The requirement :

Due to an upgrade in the component being tested now, I need to step up the current per phase to 5A.

I searched the net and if I live in UK/US/Europe I would have got a packaged high power H-Bridge driver by courier tomorrow. Since I happen to be in India, to resolve the issue fast, I need to build a discrete high power H-Bridge.

Solution : (?) I have studied the L298 data sheet in detail and it has 8 transistors and 8 AND gates ( 4 of which have one input inverted )

What if I arrange to replicate the same setup by replacing the transistors with MOSFETs and gates with discrete components ?

Any suggestions or tips or has anybody attempted such ?

Or is the idea a non-starter?

Thanks folks.

Raghu